Changes since SOA version
IXFR is a zone transfer request that returns changes since a specific SOA version. Enter the SOA version to request changes since then.
Not an apex domain
The domain ip-166-113-81-108.static.oecfiber.com is not the root of its zone.
Instead, try zone transfer on oecfiber.com .
Instead, try zone transfer on oecfiber.com .